How to make a rolling pointer to display between three different links using JavaScript?

I am having three different versions of a websites that I need to show them to the visitors one after the other, this will produce the same probability for all the users to see all three version of my website.

For example;

if the user-1 visited the webpage, the script will display the website-1 @www.example1.com

if the user-2 visited the webpage, the script will display the website-2 @www.example2.com

if the user-3 visited the webpage, the script will display the website-3 @www.example3.com

if the user-4 visited the webpage, the script will display the website-1 @www.example1.com

and so on…

my question is how would that be possible to make such a pointer to do this action on my server?